b. liquids.
c. malleable.
d. gases.
Answer : At room temperature, none of the metals are gases.
Explanation :
The properties of metals are :
Generally all the metals are solid at room temperature but with exception, the mercury is liquid at room temperature.
Generally all the metals are hard but with the exception, sodium and potassium are soft and easily cut with the knife.
The metals are malleable, ductile, lustrous in nature.
Metals are good conductor or heat and electricity.
Hence, At room temperature, none of the metals are gases.
Answer: Option (d) is the correct answer.
Explanation:
It is known that most of the metals are solid at room temperature but with a few exceptions like mercury is a liquid at room temperature and sodium is a soft metal as it can be cut with a knife.
Also, metals are malleable in nature that is, they can be shaped into thin sheets.
But metals are never gases. Hence, we can conclude that at room temperature, none of the metals are gases.
come close together and stick to each other
B.
escape into the surrounding air
C.
connect to each other in a rigid structure
D.
stop moving relative to each other
Answer:
come close together and stick to each other
Explanation:
The difference between three phases of a matter is the intermolecular interactions and thermal energy.
In case of gas, the intermolecular interactions are weak and thermal energy is high. So molecule move randomly, far from each other.
However in case of liquids the force of interactions are relatively stronger and the molecules are held together more effectively than gas.
Thus in order to condense a gas, we have to make the molecule come closer to each other so that they can be converted to liquid.
A.
come close together and stick to each other
Using the formula q = mcΔT, and substituting the values for mass, specific heat capacity of iron, and temperature change, it is calculated that it takes approximately 3.058 KJ to warm 125 g of iron from 23.5 °C to 78.0 °C.
To calculate the amount of heatneeded to warm 125 g of iron from 23.5 °C to 78.0 °C, we use the formula q = mcΔT, where 'm' is the mass in kilograms, 'c' is the specific heat capacity, and 'ΔT' is the temperature change. In this case, the mass 'm' is 0.125 kg (since 1 g = 10^-3 kg), the specific heat capacity 'c' of iron is 0.449 J/g°C (or 449 J/kg°C), and 'ΔT' is 78.0 °C - 23.5 °C = 54.5 °C.
Substituting these values into the formula, we get q = (0.125 kg) * (449 J/kg°C) * (54.5 °C), which gives a result of approximately 3.058 KJ.
Therefore, it would take approximately 3,058 KJ to warm 125 g of iron from 23.5 °C to 78.0 °C.
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To warm 125 g of iron from 23.5 °C to 78.0 °C, it requires approximately 3.93 kilojoules of energy.
To calculate the number of kilojoules required to warm 125 g of iron from 23.5 °C to 78.0 °C, we can use the formula:
q = m * c * ΔT
Where:
Using the given values:
Substituting the values into the formula:
q = 125 g * 0.450 J/g°C * (78.0 °C - 23.5 °C)
Simplifying the equation:
q = 125 * 0.450 * (78.0 - 23.5)
q ≈ 3933.75 J ≈ 3.93 kJ
Therefore, it requires approximately 3.93 kilojoules of energy to warm 125 grams of iron from 23.5 °C to 78.0 °C.
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Answer:
Explanation:
that when water is boiled in a open beaker and it disappears that it evaporates into the air
B. a decrease in greenhouse gases
C. average decrease in the temperatures near Earth's surface
D. a decrease in carbon dioxide emissions
Answer: The correct answer is A. average increase in the temperatures near Earth's surface
Explanation: The reason this is correct is that global warming is it getting hotter, logically the temperatures near Earth's surface will be getting hotter as well. Hope this helps